Phh.adei.phia, March 12. -The will or Isaiah V. Williamson, the dead millionaire, ■was admitted to probate Mondayinthe register oí wills office. The estáte of Mr. . iamson will amount to between 8,000,000 and 9,000,000, exclusive of the f und of 2,2öO,000 for the Mechanical schooL Any more approximate valué can not be given until an inventory oan be taken of the personal property. Of this amount special bequests are made to the surviving brothers and sisters of the testator, the income of 60,000 is given to each of their children during life, $1,000,000 is given to charity, and the remainder, forming the bulk of the estáte, is devised to the grandnephews and grandneices of the deceased, share and share alike.